August griese



(No Model.)

A. GRIESE.

ATTACHMENT POR STEAM BOILBRS. No. 606,384. Patented June 28,1898.

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'llNiTnn STATES- PATTNT Tirion,

AUGUsT GRIEsE, oFnAMBURG, GERMANY.

ATTACHMENT FoRfsTEAM-BOILERS.

SPECIFICATION forming part of Letters atent No. 606,384, dated J une 28, 1898.

Application and January i9, 1898. sel-a1 N62 667,153. (No man.)

To all whom, t may concern;

Be it known that LAUGUsT GRIEsE,a citizen ofthe Empire of Germany, residing at Hamburg, Germany, have invented certain new and useful Improvements in Attachments for Steam-Boilers, oi' which the following is a specification.

This invention relates to an improved attachment for steam-boilers by which the water in the boiler, and especially thewater at the lower part thereof, where it is less exposed to the direct heat of the fire-as, forinstance, in iiue, locomotive, and other boilers-is agitated and moved into contact with the heated walls of the iiues passing through the boiler; and the invention 'consists in an attachment for steam-boilers comprising a spindle passing vertically through the boiler and supported at its lower end in a step-bearing and at its upper end in a neck-bearing, said spin; die being provided at its upper end with a helical screw-blade loca ted in the stea1n-outlet pipe and with propeller-blades at the lower end, so that the outgoing steam, passing from the top of the boiler through the steam-ont let pipe, rotates by impact with the helical screw the spindle and propeller at the lower end, so as to produce the agitation or circulation of the water around the i'lues, as will be fully described hereinafter and finally pointed out in the claims.

The accompanying drawing represents a vertical transverse section through a Cornish boiler, showingl my improved attachment for agitating the water in the boiler in position therein. Y

Referring to the drawing, A represents a Cornish flue locomotive boiler ot' any approved construction, B the steam-outlet pipe leading to the engine, with its valve, and C a vertical spindle extending diametrically through the boiler and supported at its lower end in a step-bearingD and at its upper end in a neck-bearing and stuffing-box D' in the bend B', by which the top of the boiler is connected with the steam-outlet pipe B. The

spindle C is provided in the bend B with a helical blade E, so that the impact of the outgoing steam on the blade produces the rotation of the spindle C and also of the small of the spindle.

propeller F, that is attached to the lower end The small propeller-blade produces the agitation of the Water in the boiler and imparts Ato the same a tendency to move in an upward direction around and around the lines G for the products of combustion, so that the cooler portions of the water in the lower part of the boiler are placed in contact with the heated walls of the lines, and the water thereby heated in a more uniform manner and the generation of steam accelerated thereby.` The circulation of the water in the lower part of the boiler toward the upper part of thesame has a further advantage-namely, that thev small air and steam bubbles thatadhcre to the-surface of the walls of the lues are carried away from said surface, so that the heating-surface is kept intact, and thereby the continuous ebullition of the water and its continuous change into steam is kept up.

I-Iaving thus described my invention, what I claim is l. The combination, with a'Cornish or other lsteam-outlet pipe adjacent to the boiler, a

propelling device on said spindle in said steam-outlet pipe, and an agitating device on said spindle operated by the propelling device, substantially as set forth.

2. vThe combination, with a Cornish or other fine-boiler, of 'a spindle supported in suitable bearingsv in said boiler, a steam-outlet pipe, said spindle passing through the end of the steam-outlet pipe adjacent to the boiler, a helical screw on said spindle located in the steam-outlet pipe, and a screw-propeller on said spindle operated by the motion imparted to the helical screw by the outgoing steam, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in pres ence of two subscribing witnesses.

AUGUST GamSnn Witnesses: i

GEORGE W. J AEKEL, OonA E. GAST.. 

